Island



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Cl-IARLES L. SPENCER', OF P RovrD'ENoE, RHODE ISLAND.

Letters Patat No. 87,218, dem; Femm 23,1869.

lAPPARATUS Fon coNvEnTING MOTION;

The Schedule referred to in' these Letters Patent and making part' of the same.

To all whom 'it may conce/rn.-

Be it known that I, CHARLES L. SPENCER, of the.

city and county of Providence, in thev State of Rhode Island, have invented a new and useful Improvement in Apparatus for Converting Motion and I do hereby declare the following is a full, clearand exact description thereof', reference being had to the accompanying drawings, and to the letters of reference marked thereon, in which- Figure 1 represents my improvement when opened.

Figure 2 represents the same when thetreadle is at the lowest point.-

Figure 3 represents'it whenthe treadle is at the highest point.

Figures 4, 5, and represent a pawl-arrangement.

Figurev 7 shows the' front view of the lower or ilexible parts of the connecting-rois.

In the accompanying drawing, A A, fig. 1, are two rods, curved at their upper ends, the lower ends of' which are made flat and exible.

These rods are held together and in place, by means of the clamp B, with rivets, as shown in fig. 7 forming a double flexible connecting-rod, a hole being drilled through the bottom part of clamp B, ligs. 1, 2, and 3, for the purpose of connecting t'o a treadle by a pin, the treadle being represented in same figures by dotted lines.

These iexible rods maybe constructed of one piece of metal, having central connection of sucient thickness for their use and wear.

When I used in connection with two reciprocating pawls, attached on a shaft, a rotary motion is produced with theconnection of thetreadle.

all of which is shown in LettersPatent issued vto me, March 4, 1862, No. 34,597, and used in connection with a pair of jointed tongs, with a separate spring between them; but the same constitutes no part of the present invention, and are shown as suitable devices to be used in'connectionwith the exible connecting-rods.

Myvimprovement consists in the employment of a and separatel spring, in combination' with pawls described in the patent referred to, or any other suitable paWl-and-rat'chet mechanism. So that at all times, from the extreme points', as indicated by the dotted lines'in figs. 1, 2, and A3, the line of action will be direct and positive from the central connection of the treadle to the centre of the driven shaft.

With this improvement, proved by actual experiment, the double flexible vconnecting-rod works nearer to the centre, obtaining more velocity to the shaft, with no liability ofhanging upon the dead-point.

What 1 claim as my invention, and desire to secure by Letters Patent of the United States, is

The two flexible connecting-rods A-A, in combination with any suitable pawl-and-ratchet mechanism, for converting a reciprocating into a rotary motion, substantially as described.

Witnesses: CHARLES L. SPENCER.

WM. H. GREENE, P. B. STnvEss, Jr.

Figs. 4, 5, and '6, represent the pawl-arrangement,

double flexible connecting-rod, dispensing with a joint 

